Decking for the roof which one to choose: choose the thickness for the roof of the house. Roof decking: how to choose and lay the cover? What thickness should be the profiled sheet for the roof

Among the wide range of roofing materials that are used today, corrugated board stands out. But many consumers are poorly oriented in the intricacies of such material and evaluate it simply by its appearance. That is why very serious mistakes are made.

Peculiarities

Roofing corrugated board always meets more stringent requirements than wall option this material. But it is used in the most different occasions. It is one thing when you need to cover the roof of a solid cottage, another thing is decorating a private house, and the third thing is when work is underway on a temporary building. You always need your own approach. In any case, corrugated roofing is superior to many other materials in terms of such parameters as:

• corrosion protection;
• ease of transportation and installation;
• low weight and versatility in use;
• environmental Safety;
• minimum maintenance requirements.

But users will have to reckon with possible difficulties. Only with the use of reliable sound insulation is it possible to defeat the "loudness" of a professional sheet. It must be transported with great care, because the material is deformed very easily.

It is required to mount the coating carefully and carefully - the slightest flaw can devalue all the work. If the integrity is violated, the inner parts of the cake will come into contact with water and quickly collapse.

Options

When choosing a corrugated board, you should first deal with the following characteristics:

• type of coverage;
• wave;
• sheet width.

Corrugation for roofing material can have a height of 1 to 11.4 cm. The type of construction that meets the requirements for height and width is marked with the letters HC. Most often, corrugated board is made in accordance with state standards, as evidenced by the mention at the end of the marking entry. In the absence of such data, the product must comply with some other of the legitimate standards. The letters A, B show which side of the profiled sheet is painted (front or back).

If R is present on the label, the product has a capillary groove. As for the production technology, corrugated board is made in four main types. In addition to galvanized thin sheet, there is also a thin sheet with an aluminum shell, with a mixture of "aluminum-silicon" or "aluminum-zinc".

Even if two different models are produced on the same installation, they may have dissimilar characteristics: often wall and roof products are produced in the same cycle. Galvanized steel is considered thick at a value of 5-7 mm; thinner products are necessarily covered with a polymer layer.

Depending on the type of polymers used by manufacturers, various options. So, polyester is outwardly beautiful, but almost does not protect against mechanical defects. Flaking and abrasion over time is almost inevitable. Pural is similar in its characteristics to polyester, but more affordable. The relatively expensive variant of PVDT is both strong and resistant to direct sunbeams, has rich colors.

Metal slate is stronger than asbestos-cement sheets and much better than plastic panels tolerates intense heat. It is distinguished by the application of zinc on two sides of the sheet at once, the use of a specially selected varnish on the reverse side and the addition of coloring pigments to the polymer.

The plastic layer helps to ensure resistance to UV rays, liquid and minor mechanical defects. They will remain on the surface and will not grow in depth or in breadth. All these features make metal slate one of the main options for decorating the roofs of houses.

Sheet characteristics

In modern factories, sheet steel is made with different depths of the zinc layer. The consumption of pure zinc during the operation of production plants can be from 0.1 to 0.3 kg per 1 m2 in the coefficient. The minimum film thickness is always at least 90 microns (that is, from 275 g per 1 sq. M). Such a shell is able to protect the main body of metal from corrosion for 15-20 years even under harsh operating conditions. But due to the development of technology, even this level can no longer be considered an ideal choice.

Galvanized profiled sheet has now almost ceased to be used on the roofs of houses, and is mainly used on temporary structures and outbuildings. The high cost of modern varieties of this material is apparent: there the sheet lasts longer, and significantly, and outwardly much more attractive.

According to the builders optimum thickness corrugated roofing is 0.45-0.5 mm. An increase in the wave height compared to the wall counterpart already makes it possible to guarantee the necessary strength.

If snowy winters occur in a particular area, it is better to use thicker metal. According to GOST, the permissible deviation in the thickness of the corrugated board does not exceed 0.1 mm.

As for the choice of color, here you need to focus not on fashion and not on your own taste, but on the objective requirements of design. Increasingly in demand in last years becomes a profiled sheet that imitates the appearance of natural wood or other natural coating. But this option is bad on the roof because it is poorly combined with others. decorative elements and can quickly become frustrating.

Given the inevitable distortion of color when displayed on monitors and in print, it is worth choosing a tone "slightly lighter than the correct color appears."

Construction types

When the profiled sheet is chosen in accordance with all the rules, the final success cannot yet be considered a guaranteed affair. After all, you need to thoroughly understand the intricacies of the roof being created and its structure. The cold format of the roof is considered the most effective, because a layer of air is created in the under-roofing room, which ventilates the roof itself and the rafters. But it is impossible to do without insulation in constantly used residential buildings. The device of a cold roof from corrugated board involves the use of:

• rafter legs (from boards with a section of 5x15 cm or metal);
• waterproofing;
• counter-lattices;
• lathing (boards 4x10 or bars 4x4 cm) divided or inseparable;
• actual corrugated board.

The technology of creating a warm roof from corrugated board requires the use of thermal insulation in the gaps of the rafter legs. These gaps are most often filled with mineral wool, and under the rafter system there is a membrane that restrains the flow of steam. Since the roofing material blocks water vapor, it is absolutely unacceptable in this case. It is advisable to lay corrugated board in both cold and warm versions only on slopes from 8 degrees and steeper. With an insufficient slope, water will begin to pour into the horizontal joints and quickly flow onto the heads of the residents of the house.

If you have to cover the roof at an inclination of less than 8 degrees, the sheets overlap each other with an overlap of 20-25 cm. The use of silicone sealant helps to minimize the risk of leaks.

For your information: the lower the steepness of the roof, the greater the amount will have to be spent on its processing.. Even with slopes from 9 to 15 degrees, it is impossible to overlap less than 20 cm, but the use of sealant at the joints is left to the discretion of the builders. Roofs with slopes from 15 to 30 degrees can reduce overlaps to 15-20 cm, and on even steeper sections this figure drops to 0.1-0.15 m.

Roofs with a small slope of corrugated board should be made on a wooden crate made of edged lumber or from moisture-resistant plywood. When the steepness increases, the allowable distance between the key nodes of the crate also increases.

It is unacceptable to lay a profiled sheet on roofs whose steepness exceeds 60 degrees.

The largest gap from one rafter leg to another in any scheme cannot be higher than 150 cm. Under a warm roof, this distance is reduced to 1.2 or even 0.6 m to simplify the installation of thermal protection. The choice of sheets that match the length of the slope will help minimize the number of joints. But their greatest length is no more than 10 m. If you build up the structure further, it becomes unstable.

A gable roof for corrugated board can be made with hanging rafters, but a layered one (based on internal and external walls to the same extent) is also allowed. It is advisable to attach the sheets using roofing screws, supplemented with a sealant. The neoprene washer, flattening, makes the resulting hole as airtight as possible.

• skates;
• pipe exits;
• slope connections;
• valleys.

Similar elements can also be used on a shed roof, they are painted in the same color as the profiled sheet itself. Therefore, the mounted products do not spoil the appearance, it is unlikely that anyone will notice them at all. Appearance roofing, finished with corrugated board, differs from options for tiles.

For metal tiles, thinner steel is used, although it is obtained using a similar technology (cold rolling). Both materials can hardly be called particularly heavy, while additional tenths of a millimeter for both can give the roof several years of life.

In order for the cake to last longer and not have to prematurely dismantle the outer shell, it is necessary to impregnate the crate with flame retardants and antiseptics. Regardless of the tightness of the roofing, water will still find its way in. And it is better that the lowest details of the structure meet it “fully armed”.

When it turns out that the slope is longer than the technically permissible profile sheet, you need to place an order with the expectation that the fixing point of the transverse joint is above the batten board. The edge of each subsequent stacked sheet should cover the capillary drain of the previous one.

Manufacturers Overview

Roof decking is available big amount manufacturers, but not all have the same conscientious approach. The machines and their modes of operation differ, the raw materials and the applied coating differ. Judging by the reviews, best quality profiled sheet achieved in Russia - it is made in the Lipetsk region, in Magnitogorsk and Cherepovets. But Turkish, Chinese and Indian materials are many times worse.

Important: profiled sheet with imitation natural stone, bricks and logs is made exclusively in South Korea and nowhere else, everything else is fake.

Among foreign suppliers, the leading Western European concerns are in the first place:

• Rautaruukki Group;
• Arcelor Construction;
• Tekla and a number of others.

You can not limit yourself to just the name and type of profile. The correct selection of a profiled sheet takes into account what area needs to be covered, and how the roof is configured, how many slopes it has. The average volume of precipitation, the difficulty of installation, the laboriousness of replacing a damaged sheet are taken into account. For the house it is worth choosing a material with the maximum possible quality, but sheds can be covered with cheaper coatings. With an increase in the wave, the mechanical rigidity of the corrugated board and the passage of liquid precipitation down to it increase; the cost increases at the same time.

You can not put on the roof a sheet whose wave is 2 cm or less. The lower part of the wave should be as wide as possible, this facilitates the flow of water. Structures with a high wave on sloping roofs are placed with an overlap in one line, and, conversely, a small wave is compensated by a double overlap.

Products with capillary grooves act as an auxiliary barrier that prevents melt water and raindrops from getting under the sheet. The groove also partially protects against condensate, but if the wave height is chosen incorrectly, it will not be able to help.

An unpainted profiled sheet without a zinc layer rarely lasts more than 5 years, and if it is applied, the life of the product can increase up to a decade and a half. When selecting colors, it is worth paying attention to the fact that after some time even the most reliable coatings will burn out in the sun. The longer the roof is used, the stronger the visual difference becomes. This can bring an unpleasant surprise when replacing single damaged sheets with goods from the same collections. It is unacceptable to take products with chips and folds, with peeling paint.

Before buying, it is recommended to carefully measure all linear dimensions of each element. If they differ from those declared by more than the standard deviation provides, the product cannot be considered of high quality. It should be ensured that the first waves of the upper sheets coincide as accurately as possible with the closing strips of the underlying profiled sheet. Then the risk of seepage of precipitation inside will be minimal.

The separation of corrugated board at large reputable enterprises is carried out using a special machine - a guillotine. It allows you to make the most even cut, will not leave visual notches. Therefore, you do not have to be afraid that the edge of the profiled sheet will suddenly be covered with rust.

If sellers show color on round samples, then they are trying to overestimate the strength of the product, to create a false impression about it. It is always worth demanding to issue a full-fledged sheet and apply little effort to it. After this manipulation, the corrugated board should quickly return to its original position.

You can not buy a profiled sheet if a detailed specification and layout diagram are not attached to it. This moment is especially important if the geometry of the roof itself differs from the standard options. The packaging must be intact and undamaged. Before work begins, it is left in place, but then immediately removed.

The presentation of certificates, warranties, licenses and technical data sheets should always be required.

Accessories

Accessories (auxiliary details) are just as important as the corrugated board itself. Moreover, they must be selected simultaneously with the coating itself. Only harmoniously combined elements will ensure high-quality styling and long service life of the coating. Additional elements are designed to complete stylistic design joints and protect them from destructive influences. Under protection, you need to take more points of attachment to walls, windows and gables.

The more complex the configuration of the roof, the more auxiliary elements are required, including expensive fixtures. End strips are able to block the action of moisture on the joints.

And also thanks to them, the destructive effect of wind on the coating as a whole is prevented. Planks can be placed both in exact dimensions and with overlaps. In both cases, an overlap of the final profile sheets of at least 5 cm is required.

Fastening the profiled sheet to the base is provided by self-tapping screws: roof type they are helped by attaching the end piece to the crate or frontal board. Eaves strips contribute to the direction of the water leaving the slopes directly into drainpipes. Therefore, their use protects the facade of the house from waterlogging. The plank simultaneously becomes a decorative covering for eaves boards. You need to put it on the end boards of the crate - and the overlap overlap is at least 10 cm.

The groove bar is placed directly under the ridge, masking the ends of the profiles located below. Her role is purely decorative, which cannot be said about the flashings. Adjoining strips save the junction of roofs with walls, pipes and other vertical planes from getting wet and dusty. Sometimes engineers provide for the presence of strobes in such slats, thanks to which you can go deep into the walls.

All shaped parts should be mounted only after the arrangement of the roof as a whole.

So that the slopes located at different angles represent one whole and do not diverge anywhere, valleys are used. They, on the contrary, are placed before laying the finish coat. Additionally, these elements improve the quality of waterproofing. Upper valley covers the inner corner of the roof joints, and it is this detail that is recognized as the most difficult in terms of engineering. And the role of the ridge elements is to connect the roof fracture lines to each other; along with this, they increase the decorative qualities of the design.

Skate elements simple type- only metal corners, their width is 10-30 cm. In most cases, flanging is used, the edges are bent by about 15 mm. If possible, it is worth selecting the most rigid structures, installers really appreciate them for their simplicity. In addition to the ease of layout and fastening, the advantage is resistance to the bending action of strong winds. The U-shaped element is distinguished by accelerated installation, and the timber is initially placed, and then the skate.

Semi-circular ridges feature a flexible geometry that can be adapted to individual roofs.

Differences are manifested in the proportions of the diameter of the ribs. The end fragment must be used. For installation, always use a sealing tape placed in the gap from the ridge to the corrugated board. The use of a sealant helps to avoid penetration into the cake:

• moisture;
• insects;
• small birds.

Material Quantity Calculation

Having dealt with the device of the roof from the profiled sheet and its shared device, you still need to find out the need for stacked materials. Specialized programs will help to accurately calculate the required amount of roofing, taking into account a certain overlap. They are able to assess the necessary parameters of the roof - both together and separately.

Such software successfully copes with even the most complex tasks that people face. Alternatively, you can contact the design organization - they not only know how to calculate everything, but also draw up professional drawings.

For the most simple options roofing, there is no need for sophisticated calculation. All preparations can be done by the owners of the house themselves. When calculating the area of ​​\u200b\u200bthe slopes of a standard form, generally accepted geometric formulas from the school course are used. Then, the calculation for the extreme elements of the roof is added to the result obtained.

When calculating, they operate not with the total, but only with the useful width of the corrugated board.

The number of stacked sheets in horizontal rows is calculated by dividing the lengths of the slopes by the useful widths of the profile sheets. Rounding up helps to avoid errors and incompleteness. The standard overlap is taken at the level of 80 mm, but you need to pay attention to how large it is in a particular case. It is extremely important to conduct all calculations in such a way that an integral structure is created. Additionally, the values ​​​​of cornice overhangs and additional details are calculated.

The typical length of extensions is taken to be 200 cm. Their number is determined by dividing the length of the slopes by 1.9 (based on standard overlap). For valleys, overlap is done more, and therefore here it is already necessary to divide by 1.7. As in the case with the profiled sheet itself, it is required to round the received numbers up. For 1 sq. m, 7-8 self-tapping screws are consumed, additional elements are covered with 8 self-tapping screws per 1 m2.

Installation Instructions

Installation of corrugated board is easier and more convenient to perform if you immediately buy a kit that is ideally sized. But this is not always possible purely technically, and in such cases, a special cutting tool. When fitting, the coating is spread on a solid, even base, most often on clean ground. Among all power tools, a drill with a disc-shaped nozzle demonstrates the highest efficiency.

When there is no electric machine, you will need to use metal shears or a hacksaw with a slight tooth.

It is strictly forbidden according to the technology to cut the profiled sheet with abrasive devices. Significant heat generation during operation adversely affects the practical properties of the laid material.

Since cutting will inevitably break the edge, you will need to think in advance about a paint that matches in tone with the main products. To lift the necessary sheets up, use logs - this is the easiest way. The profiled sheet is supposed to be mounted on hexagonal self-tapping screws 8 cm long with a sealing gasket. It is unacceptable to tighten them all the way, as this may break the waterproofing.

Sheets are attached in the lower parts of the waves, but for ridge elements and overlaps, fastenings are made in the upper ones. Experienced craftsmen mount corrugated board, moving from the end of the slope. Lateral overlap starts at ½ wave, but on gentle slopes - less than 120 degrees - it is already 1.5 profile waves.

It is very important to equip the gable cuts in accordance with all the rules, if this is not done, the very first day with strong gusts of wind will be the last for the roof. When the sheet allowance is 5-7 cm, you need a 2.5x8 cm wind rail, screwed with self-tapping screws.

But in the absence of allowances or their insignificant size, the rail is supplemented with a wind bar, outwardly resembling steel corner. Such a bar is fixed at intervals of 20-30 cm, with a transverse overlap of 10-15 cm. The slopes are pressed against the walls using corner strips. Whatever the connection, the materials are connected with self-tapping screws every 0.2-0.3 m. The overlap is at least 10 cm.

When repairing or replacing a roof, horses should be fixed from the angle where the impact of wind and precipitation is least. The snow barrier is especially important at the time of thaws, it allows you to avoid the rapid collapse of miniature avalanches down. Such an element is placed just below the roofing edge across the slopes. For fastening, bars are prepared in advance. Of course, for any work on the roof, safety rules must be observed.

Properly insulate the roof of corrugated board will help the combination mineral wool and vapor barrier. Nobody forbids taking other seals, but it is cotton wool that is recognized as the most powerful variety. The choice between roll and sheet options is not fundamental - they have the same thermal qualities.

You can attach a heater with your own hands in one of three ways:

• screw retention;
• thread fastening;
• adhesive bond.

Either approach requires a balance between joint tightness and minimal seal compression. After all, the blocking of cold is provided not so much by the cotton wool itself, but by the air contained in it. A vapor barrier is placed above the cotton layer, which prevents moisture from constantly circulating in the air from entering the insulation.

It is unacceptable to insulate 100% of the roof, always leave cold triangles. The area is not covered with cotton, and it will help the normal air exchange of the attic space and the outside world.

You can also install corrugated roofing on top of an existing one. The main thing is that its operational parameters are decent, and that the total load is not excessive. Since profiled sheets are relatively fragile, they should not be stacked on the ground. It is recommended to use stands made of boards approximately 2.5 cm thick, spaced in 0.5 m increments.

Subsequently, the roof must be thoroughly cleaned at least once every six months; if scratches are found on the corrugated board, problem areas are only covered with a suitable paint.

You can speed up the fastening of the material if you use a screwdriver, and not a simple drill. Joints are processed by hand riveting machines, with the help of which it is easy to place steel rivets.

Rivets made of any other metals and alloys are prohibited. It is recommended to use a special metal cutting machine. Marking and measurements are carried out with the same tools as for any other construction work.

You can attach a profiled sheet strictly using specialized fasteners. Only self-tapping screws for metal will do. Mounting belts and safety devices are certainly used, even on relatively flat roofs the first floor in dry windless weather. If the slope is large, it is required to install special barriers in addition to the corrugated board. It is possible to move along the already delivered sheets only in soft shoes without sharp protruding parts.

Sometimes it is possible to attach profiled metal to several sheets of the bottom row, while retreating from the cornice strip by 35-40 cm. In this case, fastenings are made for every second wave. The boards at the ends are hemmed with wind corners after the final attachment of all sheets. Only at the very last stage are junction strips, outlets of various pipes and similar infrastructure mounted.

The crate is done after waterproofing. The trapezoidal profile allows the use of three types of bars:

• 30x70 mm;
• 30x100 mm;
• 50x50 mm.

The pitch of the rafters is 0.9-1.2 m. The most accurate information about the required dimensions can be found in the accompanying documents for corrugated board. A strong two-sided flooring of boards, 0.6 m distant, should be placed under the groove bar at the level of the crate. The groove made of galvanized steel should be mounted with an overlap of at least 200 mm. If the roof is flat, the joints of this element are made using sealing mastics.

The bottom strips of the grooves are initially attached at the edges (screws are screwed in there), but the final fixing is carried out simultaneously with the entire coating. At the time of laying the sheets, they need to be trimmed relative to the overhangs (in no case at the joints).

Cleaning of the laid profiled sheet from snow and ice is carried out using wooden or plastic shovels. Steel tools for this purpose cannot be used in principle. By following the basic rules for choosing, laying and handling corrugated board, you can guarantee a long service life of the coating.

In addition to standard requirements, there are a number of subtleties when laying corrugated board on certain types of roofs. When it is placed on a four-slope house, one or two corrugations of the panel are superimposed on the placed element.

It is necessary to overlap the longitudinal recesses in the amount that is determined by the angle of inclination of the slopes and the bearing capabilities of the material. The calculation is required to be carried out taking into account how many corrugations need to be overlapped. Single panels are assembled into a large sheet using short self-tapping screws that do not penetrate into the crate.

The attachment of the metal roof as a whole to the crate is carried out with a deepening into the tree, while the fasteners are screwed through the concave sections of the corrugation. All fasteners must have the same color as the coating itself. When working on hipped roof initially mark the central axes of the starting sheets and slopes. Then they try on everything at once, achieving alignment of the axes and drawing lines of cuts. Further sheets must be measured and cut to actual size.

When working with a hip roof, the first sheets are mounted, achieving the coincidence of the edge with the farthest edge of the right or left racks in the ridge runs. The starting product is not cut along an oblique path, it must be placed on the entire height of the roof. Only panels in contact with oblique hip ribs are supposed to be cut. Tent constructions imply the same scheme for cutting sheets on each slope. When hip roof end slopes are covered with material cut according to the “tent” pattern, and long ones also require a little trimming.

The height of the sheets is calculated according to a carefully thought-out scheme, trying, whenever possible, to close the hip rib 100%. The layout of blocks on a triangular slope is made from the middle, and on a pentagonal one - from the extreme point of the ridge runs.

In any variant of work, with any type of roof, one should strive to limit the number of parts whose width is inferior to the size of the sheet by more than 50%. Each such section turns out to be weakened, since the number of connection points increases. The height of all profiled panels is increased by the width of the overhangs above the eaves.

Already at the time of design, it is necessary to decide whether the installation of gutter holders will be carried out before placing the corrugated board or not. The difference is due to the fact that in the first situation, long brackets are used, and in the second, shortened hooks. Roof pies under the profiled sheet do with one or two ventilation circuits. Their number is determined by how the waterproofing is done.

The waterproofing layer under the steel roof with an outer polymeric layer must be free of bitumen.

The very first circuit is placed in the interval from insulation to waterproofing - provided that water is held back by a plastic film or anti-condensate material with a fleecy surface. But under the diffusion membrane, there is no need to create a ventilating passage, it will itself release excess moisture as soon as it arises. mechanical stress. As for the second ventilation line, which separates the waterproofing from the metal, there can be no two opinions - it is needed in 100% of cases.

The scale of the ventilation gaps is selected in proportion to the areas of the slopes. Usually this proportion is about 1%.

If the outflow and the air intake channel are separated, the resulting figure can be divided in half. In the case of a gable roof, the values ​​obtained are identical, and for a four-slope roof, the difference is eliminated by adding an aerator. Rafters for profiled steel are made from the corners of the channels, laths - from square pipes or a profile in the shape of the letter P. When work is carried out on residential building, it is undesirable to use metal truss systems. Much better for corrugated board fit wooden bases especially since they are much easier to work with.

Laths under the corrugated board are placed at the same distance. It is necessary to reduce the distance only where it is necessary to strengthen the structure. This is required along the cornice overhang, the perimeter of which is weakened for further installation of the snow retainer, as well as:

Reliable protection of the building from solar radiation, precipitation, emissions of harmful substances and other environmental influences is the main purpose of any roof. Two factors are key, and in order to successfully solve this problem, you need to choose the material for the installation of the roof and perform the correct installation. On the market building materials popular new roofing - corrugated roofing.

Roofing corrugated material characterized by durability, high strength and decorative effect. It is used to cover the roofs of buildings for various purposes. It is made of sheet steel with a thickness of 0.5 mm to 1.2 mm using cold profiling technology.

The building material has a multilayer structure. The steel is coated with a zinc, alu-zinc coating or a protective film of pural, polyester or plastisol, which ensures high corrosion resistance.

Compared to other types of roofing materials, the profiled sheet has a low weight, but at the same time a high bearing capacity, which allows it to withstand heavy snow loads.

Manufacturers produce profiled sheets of different parameters. They must comply with the standards of GOST 24045 94. The length of the sheet can vary from 1 m to 12 m, the width is most often 1.25 m, and the number of waves is from 5 to 8. For the arrangement of roofs, it is better to use material with 7 or 8 waves.

For profiled material characterized by versatility of installation. Decking is laid on roofs with a slope. The tilt angle can be from 3º to 6º. With a slope of 3º, the overlap increases, and the resulting joints are treated with a sealant. During installation, the corrugated board is cut using a cold method. Cannot be applied welders, abrasive tools or grinders, as the material loses color under high temperatures.

The color of the coating can be any: pure white, jet black, with a metallic effect, etc. The service life of the sheets is up to 50 years, the warranty period provided by suppliers is from 10 to 15 years. The manufacturer guarantees the buyer the preservation of the quality of the texture and the brightness of the color.

Types of coatings

Coating of profiled sheets classified into protective and decorative. After the rolling mill, the sheet steel is subjected to a protective galvanic treatment. It is of two types:

1. Zinc. Zinc salts act as the working substance as a coating. As a result of electrolysis, metallic zinc settles on the material in a continuous layer. Zinc does not interact well with oxygen, so the more it is, the higher the protection of the profiled sheet from corrosion.
2. Aluminium-zinc. The coating technology is similar to the first option, only aluminum salts are added to zinc salts. Such a coating is budgetary, but the degree of protection of the material is low.

To increase protection, decorative coating from dyes and polymeric materials. It is of several types:

Coatings are applied to a layer of paint. Which corrugated board is better for the roof of the house, each consumer chooses based on their color preferences.

Advantages and disadvantages

The guarantee of the quality of the profiled sheet is manufacturer's conscientiousness and compliance with correct mode processing. Profiled sheet is increasingly chosen as a roofing material, as it has a number of advantages:

Despite such a number of advantages, this material has a number of disadvantages. These include:

• poor protection against noise;
• condensation accumulates on the surface;
• grounding is required, as the material accumulates static electricity;
• rust may appear in places where the material is cut or drilled.

The advantages of the profile sheet are undeniable, this will allow him to maintain his position in the construction materials market.

If you put low-quality material, this can lead to an early replacement of the corrugated roof. The study of technical standards will help in choosing a roofing material. So, GOST provides standards for the quality of raw materials from which metal profile material is made, marking principles, profile geometry, transportation rules and testing features.

For the roof, a profile marked "H" or "HC" is suitable. Marking "H" applies to sheets with increased bearing capacity, and "HC" - universal marking, such sheets, except roofing works, are applied to the organization of gate, fences. The numbers behind the letters are the sheet height, steel thickness, profile width and maximum sheet length. Data are given in millimeters.

In addition to marking, you need to pay attention to the following parameters:

You can choose a metal profile sheet for roofing work without having certain skills. The cheapest, but also short-lived profiled sheet is made of galvanized steel. As a rule, it is used for temporary structures.

Mounting Features

In order to carry out the installation of corrugated board, you will need a number of manual and electric tools, such as: a hammer, a long rail, a screwdriver, a marker, a tape measure, a silicone gun and a cord. You can cut profiled sheets with metal shears, a hacksaw with fine teeth, electric carved scissors. For galvanized sheets, a circular saw is suitable, but only with carbide teeth, or an electric jigsaw.

Before the laying process needs to be calculated correctly. amount of material. The laying of the profiled sheet is carried out according to the following scheme:

For high-quality and safe laying of corrugated board, it is imperative to enlist the support of an assistant.

Roof decking- one of the most popular building materials, which combines good technical characteristics, low cost and ease of installation.

The Russian market is represented by domestic enterprises. The sheet is produced by both large and small companies:

This is the minimum list Russian manufacturers of high-quality profile sheets, which can be guided when buying. Foreign manufacturers are poorly represented in this market. Imports of such products are practically absent, and exports are minimal.

If earlier slate was traditionally considered the most popular material for blood, today it is confidently replaced by corrugated board, which has excellent technical and aesthetic characteristics. To know which corrugated board to use for the roof is best, you need to consider its different options.

This roofing material can be selected in terms of color and thickness, as well as the size of the sheets, which gives it a clear advantage over traditional slate. In addition, it has a relatively small mass, and due to the coating of the material with special compounds or a colored polymer protective film, it has a fairly long service life.

The main advantages of corrugated board

On the panels intended for roofing, there are always special locks that help connect the two panels. Most often they represent one wave of corrugated board without insulating material.

The positive qualities of such a roofing material include:

• economy - in the sense that one action "kills T reh hares";
• ease of installation;
• heat resistance, especially if mineral wool panels are used;
• the issue of not only the external covering of the roof is immediately resolved, but also interior decoration attic
• low weight, which reduces the load on the load-bearing walls .

In addition to using sandwich panels to cover the roof, they are also used to insulate the walls of industrial, residential and commercial buildings built from different materials.

The influence of the roof slope on the calculation T t of the required amount of corrugated board

When choosing corrugated board, it is very important to take into account the slope of the roof slopes, since it is necessary to ensure good water drainage during summer precipitation and heavy snowmelt. It depends on the slope angle how much overlap of adjacent sheets should be made on top of each other if the roof is covered from the ridge to the overhang not with one single sheet, but is made up of several.

• For example, if the slope is up to 10 degrees, then the sheets are overlapped by 300 mm and, in addition, in order to avoid leakage, the overlaps of the sheets are additionally coated with sealant for waterproofing.
• With slopes from 10 to 15 degrees, the overlap must be at least 200 mm.
• With a slope of 15 to 30 degrees, the overlap can be reduced to 170 mm. If steeper slopes are provided, then even 100-150 mm will be enough.

The recommended roof slope for this roofing material is at least 20 degrees. In extreme cases, when an already finished roof is overlapped, and it is impractical to redo it, the slope should be at least 10 degrees. In this case, as mentioned above, the joint must be coated with a sealant.

In addition, it is necessary to take into account the fact that if the slope of the roof is small, up to 10 degrees, then the material should overlap in width not by one, but by two waves.

Installation of roofing corrugated board

• Under the flooring of the roofing material, a crate is necessarily arranged. Her step also depends on the slope of the ramp. The boards of the crate are stuffed with a solid plane, if the roof has a slight slope of the slope - up to 10 degrees. The larger the angle, the wider the step between the boards of the crate. Usually on slopes of medium steepness it is 450 mm, with corners above 30 degrees - 600 mm.
• The lathing is stuffed onto a walled waterproofing film, which is fixed to the rafters with thin laths of the counter-lattice. All wood used for roofing must be pre-treated.
• Perpendicular to the slats of the counter-lattice, guide battens are stuffed with the selected step, which will become the basis for the corrugated roof.
• Before starting installation, it is necessary to carry out verification measurements of the slope diagonals. If their length varies, then they need to be aligned by adding additional elements to the crate.
• The installation of sheets starts from the end bottom of the roof, if several sheets are used for each vertical row. Continue laying from right to left or vice versa. Having reached the opposite end of the roof, it is necessary to return again to the edge from which the previous row was laid. Another option is to stack the sheets in steps, in the sequence shown in the figure:

• The first sheet is not immediately fixed thoroughly - it is first screwed onto one self-tapping screw so that it can be accurately aligned with the second sheet along the wave and with the edge of the eaves.
• After laying the second sheet overlapping the first, they are fastened together along the deepening of the wave in increments of 350-400 mm.
• The screws are not screwed in too tight, otherwise the metal under it may be deformed.
• It is not recommended to step on the fixed corrugated board, in order to avoid its deflection. It is best to provide for work a special ladder, which is attached to the horse. To to the roof, and rearranged as needed.

Video: how to install roofing corrugated board

Estimated cost of decking

The price of this material may vary depending on the regions of the country. Of course, this factor is influenced by the technical characteristics of corrugated board:

• thickness of the metal base of the sheet;
• material and quality of the decorative coating;
• marking of corrugated board according to its purpose (wall or roofing);
• the presence of insulation on the sheets;
• useful sheet area;

The price of the material varies from 150 to 500 rubles per square meter.

Prices for popular types of corrugated board

Decking

Video: what determines the price of corrugated board

After the owner of the house decides on the type of corrugated board he needs - its thickness, wave height, coating quality, color, etc., it is imperative to carry out a preliminary calculation based on the dimensions of the roof, the angles of its slopes and the linear parameters of commercially available sheets . Only after that you can go to the store to place an order for the right amount of material.

In most cases, modern building materials are designed for the intended use. It is at intended use you can fully appreciate all their advantages. Being an exception, metal profiled sheet is one of the few universal building materials today. With equal success, it is used for covering roofs, cladding facades of buildings, manufacturing wall and roof sandwich panels, manufacturing various structural elements modular buildings and structures, construction of fences.

Such a wide scope of application has led to the need to produce a large number of grades of corrugated board, which differ significantly from one another. In order to understand all this diversity and decide which corrugated board to choose for the roof, you need to know what characteristics differ different kinds profiled sheet. These main characteristics include:

• sheet thickness, and, consequently, the weight of 1 m2 of corrugated board;
• height and type of surface profile;
• type and quality of the metal protective coating;
• color of protective and decorative coating;

The main types of corrugated roofing

Today, there are a large number of large and small manufacturers of metal profiled sheets on the market, many of which have developed their own products for their products. specifications. But anyway, best corrugated board for a roof it is made according to GOST 24045-94.

The standard regulates:

1. The quality of the raw material.
2. Geometric dimensions of profiles of various brands.
3. Rules for labeling products.
4. Requirements for quality control of finished products.
5. And even the requirements for storage, packaging and transportation of profiled sheets.

In accordance with GOST 24045-94, the following types of corrugated roofing are distinguished:

• metal profiled sheet with increased bearing capacity, marked with the index "H";
• wall corrugated board, marked with the letter "C";
• universal profiled sheet used in the manufacture of both horizontal and vertical structures, denoted by the letters "NS";

When choosing which corrugated board is best for the roof, it is most correct to stop at the “H” and “HC” brands. It is these types of profiled sheets for roofing that have the shape and height of the profile, providing it with maximum load-bearing capacity. This is very important especially for roofing, which often must withstand fairly significant static loads (for example, from snow that has fallen in winter).

The increased bearing capacity of corrugated board is achieved by a large wave and a special configuration. Often these types of roof decking have additional stiffeners that further increase the load-bearing capacity and longitudinal rigidity of the profile.

The choice of corrugated roofing, in the first place, significantly depends on the design of the roof. In this case, its bias is of particular importance. The smaller it is, the more weight the roofing will have to withstand. In particular, depending on which corrugated board to use for the roof, differ and performance characteristics building roofs.

For example, if we are talking about the roof country house with a large slope, then in this case you can use a professional sheet C10. This corrugated board can withstand only minimal loads, including wind loads, so a continuous crate is required.

However, C10 is one of the cheapest grades of corrugated board, which is most often used for siding. Therefore, its use will save you quite a decent amount. But it should be borne in mind that C10 can only be used for laying a small area on a steep roof in the absence of strong winds.

If we are talking about a flat exploited roof, then a supporting profiled sheet with additional stiffeners H-60 ​​or H-75 is needed. In this case, the roof will withstand not only a serious snow load, but also the weight of a person.

Grades of a professional sheet: what to choose a professional flooring for a roof depending on size of settlement load?

As mentioned above, one of the main characteristics of a metal profiled sheet is its bearing capacity, which is determined by the height of the profile trapezoid. The table below shows what kind of corrugated roof with the highest load-bearing capacity, its characteristics and scope.

In order to decide what kind of corrugated roofing is needed in your case, you need to know quite accurately the load that the roof will withstand during operation. To do this, it is necessary to determine the snow and wind load acting on our roof.

Snow load depends on the region in which the building is located. So for the 3rd snow region, it is 180 kg / m². The calculated wind load in the same region will be 32 kg/m2.

When determining the wind load for a particular roof, it is necessary to take into account its slope. To do this, the calculated value of the wind pressure is multiplied by the ratio of the height of the roof to the length of the projection of its slope. To the resulting total load, you need to add the weight of the corrugated board itself.

Depending on the result obtained, we determine which corrugated roofing sheet we need. The maximum allowable loads for the most common grades of profiled sheets are shown in the table.

So, for example, with a distance between supports of 3 m, the maximum permissible load for H60-845-0.8 corrugated board is 360 kg / m², and for H57-750-0.8 corrugated board - 409 kg / m². As can be seen from the above example, the choice of which corrugated board is better to cover the roof is significantly influenced not only by the height of the profile trapezoid, but also by the width of the sheet.

In addition to the above, when deciding which profiled sheet is better to cover the roof, the thickness of the metal must also be taken into account. The service life of the roofing directly depends on the thickness of the metal. It is believed that an increase in the thickness of the corrugated board by 0.1 mm prolongs the life of the roofing by approximately 5 years.

In addition, the bearing capacity of the profiled sheet also depends on the thickness of the metal. For example, the bearing capacity of H57-750 corrugated board, 0.7 mm thick, is 295 kg / m², and the same profiled sheet 0.8 mm thick can withstand a load of 409 kg / m².

Thus, by changing the thickness and width of the sheet, you can achieve an almost threefold difference in the maximum permissible load for the same brand of profiled sheet. This is important if the area of ​​​​your roof is large, since the cost of its overlapping seriously depends on what kind of corrugated roofing will be used.

In particular, you can take a profiled sheet with a trapezoid height of 57 mm, but with a large metal thickness and a smaller sheet width. According to its bearing capacity this option will even surpass the H-60 ​​corrugated board with a minimum sheet thickness, and will not critically lose to the H-75.

Before choosing corrugated roofing for a roof with a slight slope and a large distance between supports, it is necessary to clarify whether the profile has additional stiffeners. Despite the seeming insignificance, they seriously increase the bearing capacity of the profiled sheet.

Since not only the bearing capacity is important for the roof, but also the maximum tightness, this criterion should also be taken into account when deciding which profiled sheet to choose for the roof. In particular, if possible, it is better to focus on roofing sheeting with a capillary groove along the edge of the sheet. In this case, even an overlap in one wave will allow you to do without additional sealing of the joints.

Types of profiled sheet coatings: which roofing sheet is better based on the durability criterion?

Metal profiled sheet is made of cold-rolled sheet steel with galvanized zinc coating. The reliability of such protection depends, first of all, on the thickness of the zinc layer.

Manufacturers of rolled metal produce sheet steel with various thicknesses of zinc coating, it can be from 100 to 300 g/m². Therefore, before choosing a profiled sheet for a roof, ask if the metal from which the corrugated board is made meets the requirements of the standard.

Types of corrugated board for the roof - photo of the overlap with a galvanized load-bearing profiled sheet

According to GOST 24045-94, zinc consumption for protective covering must be at least 275 g/m2. A profiled sheet with such a coating is guaranteed to last 15-20 years without the slightest sign of corrosion.

At the same time, keep in mind that galvanizing is the most primitive and short-lived way to protect a profiled sheet from corrosion. Galvanized profiled sheet, as a rule, is used for temporary fences and buildings, as well as for utility blocks. For the roof, in the vast majority of cases, a much more durable corrugated board with a polymeric protective and decorative coating is used.

Such a profiled sheet is more expensive, but, in addition to a purely decorative function, the polymer coating provides additional protection metal surface and more than doubles the service life of corrugated board. Therefore, choosing which profiled sheet is best for the roof, it is best to focus on this option.

One of the options for how to cover the roof with a professional sheet is polymeric corrugated board and the structure of its coating

There are several types of polymer coatings for profiled sheets. The most commonly used are polyester, plastisol, pural and PVDF. In order to determine which profiled sheet is best for the roof, you need to know the characteristics of these coatings and their differences.

Polyester is a coating of a metal profiled sheet with polyester paint. This is the most budget coverage. It is applied in a layer with a thickness of 20-30 microns and can have both a glossy and matte surface. This coating has good resistance to ultraviolet radiation and temperature extremes. But due to its small thickness, the polyester coating must be protected from mechanical damage.

Plastisol is a mixture of polyvinyl chloride with various plasticizers. This coating has a much greater thickness and allows you to reproduce the texture of the surface of various natural building materials. Plastisol is highly resistant to almost all external influences.

Pural is a coating of polyurethane-polyamide paint. Its surface has a silky matte texture. A pural coating is applied with a layer up to 200 microns thick and has increased resistance to mechanical and chemical stress.

The coating of PVDF (polyvinyl difluoride-acrylic paint) has been used in the manufacture of corrugated board relatively recently. It is extremely resistant to UV radiation and various aggressive environments.

The coating must be selected based on your climatic conditions and the desired service life of the profiled sheet. For example, if you live on the coast, then you need to buy the corrugated roofing sheet that best resists aggressive environments.

In this case, the most reliable coating will be PVDF or pural, which will calmly withstand the damaging effects of salty sea air and strong winds for decades. Choosing a polyester coating, although it is much cheaper, is impractical, since the smallest particles the salts in the sea air, combined with the wind, have an abrasive effect.

For normal country house located in a temperate climate, it is just better to use a profiled sheet coated with polyester or plastisol. The use of expensive pural will simply unnecessarily increase the cost of the roof.

Thus, when deciding which profiled sheet is needed for the roof, it is necessary to take into account the maximum number of known factors. Including the climatic conditions of the area in which construction is underway.

Profiled sheet for roofing - how to choose the color of the protective and decorative coating?

When choosing which corrugated board is best for the roof of your house, you need to pay serious attention to the color of the roofing. The color of the roof can be anything from white to black. But you need to remember that it must match architectural style building and be in harmony with the materials chosen for finishing the facade of the house.

In addition, it is highly desirable that the color is practical and does not require special care. So, when choosing corrugated roofing, how to choose the color of the coating?

There are three main standards for coloring polymer coatings of profiled metal sheets. These are RR, RAL and HTS. Most often, corrugated board manufacturers use the German RAL standard. This is due primarily to its convenience.

In this standard, each shade corresponds to an individual four-digit digital code. At the same time, despite the presence in the RAL palette of more than a thousand colors and shades, the main ones are less than ten. The main color is encrypted with the first digit of the four-digit code. One corresponds to thirty shades of yellow, two to thirteen shades of orange, three to twenty-five shades of red, and so on.

Most often, corrugated board is used for roofing in the colors Moss Green (RAL-6005), Chocolate (RAL-8017) and Wine Red (RAL-3005).

When choosing a roofing material, very often buyers want to find the best option for quality and price, which combines corrugated board quite well.

There are several types of this material, the difference between which is not understood by everyone.

That is why before you make a purchase, you need to find out the most detailed characteristics of each of them, so as not to miscalculate, and in the future only enjoy the convenience and comfort.

How to choose corrugated board for the roof of the house and not make mistakes? We will talk about this further.

Like everyone else roofing materials, corrugated board has its own certain advantages and disadvantages. Precisely because of the fact that this material has much more positive qualities than negative, many buyers give their preference to him. Benefits often include: characterizing corrugated board:

• Waterproof;
• Long service life, reaching up to fifty years;
• Fortitude to high temperatures and fire;
• Sustainability before climatic precipitation, as well as wind;
• Ecological safety;
• Fairly light and fast installation process and installation;
• Big choice various color solutions according to any wishes of the client;
• light weight;
• low price;
• High bending strength.

Therefore, to determine the wind load in each specific case, the calculated data must be multiplied by the ratio of the height of the roof and the length of its projection onto a horizontal surface.

When choosing, you should also not forget to add the mass of the material itself., since it must also withstand itself.

CAREFULLY!

IN technical specification each type of flooring has a maximum load that the material can withstand. Having found the optimal value, you only need to calculate the number of sheets you need.

It is best to use brand N corrugated board for roofing., which is a load-bearing material capable of withstanding high pressure. Depending on the installation method and the type of flooring itself, it can withstand from 184 to 916 kg / m2. This is directly affected by the crate, sheet thickness, corrugation shape and the presence of stiffeners.. An additional role is also played by protection in the form of a paint and varnish or polymer coating.

What is the best decking for a roof? One of best options- H-series

Useful video

How to choose the right roofing sheet professional opinion:

Conclusion

Decking is a fairly high-quality and convenient material for covering buildings and structures, which is why it is very popular. Having chosen its optimal type, you can forget about the problem of protecting your home from all types of precipitation for a long time. In addition to its functionality, corrugated board is also quite an aesthetic material that can give the building a beautiful and attractive look.

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